Convert centimeters to inches (cm to in) and in to cm (inch to centimeter) Centimetre (American spelling: centimeter, abbreviation and symbol: cm) is a unit of length in the metric system. One cm is equal to one hundredth of a metre (amer. spelling: meter), which is the current SI base unit of length.
Painting Lesson-Color Perspective. Understanding the principles of color perspective; painting a field of strokes with the idea of warm colors coming forward and cool colors receding. Warm colors like red and yellow are considered advancing colors. Cool colors such as blue and green are receding colors.
Color vision is a function of the cones in the retina of the eye, which are stimulated by light and transmit impulses to the brain. It is now thought that there are three types of cones, each type stimulated by one of the primary colors in light (red, green, and blue or violet).